Circle of Security vs Mentalization-Based Tx (MBT)
A side-by-side comparison of recorded mechanisms, evidence review status, related condition topics, and philosophical roots.
At a glance
Source checks, condition-specific assessments and expert review are separate steps. Each assessment applies only to its stated population and use. Topic links do not establish comparative effectiveness.
Circle of Security
- Tradition
- Family Systems
- Founder
- Glen Cooper / Kent Hoffman / Bert Powell / Robert Marvin (1998)
- Review status
- Assessment not yet completed
- Focus
- Relational + Attachment
- Format
- Group (COS-P) or individual (COS-Home Visiting)
- Duration
- Short (8-20 weeks depending on protocol)
Mentalization-Based Tx (MBT)
- Tradition
- Psychoanalytic
- Founder
- Fonagy / Bateman (2004)
- Review status
- 2 condition assessments available
- Official sources
Guidelines and official sources (3)
1 clinical guideline check · 1 research recommendations check · 1 professional reference check
Read the recommendation and its scope. A source may discuss an approach without recommending it.
- CG78: recommendations for research
Research recommendation
MBT is named as an example in a research question about structured psychological programmes. This is not a named recommendation to offer MBT in CG78’s clinical recommendations.
Scope: Comparative research on psychological programmes for people with BPD.
- CG78: 2018 surveillance, Appendix A
Discussed in the source
NICE surveillance explicitly notes that CG78 does not currently recommend MBT by name. Discussion of evidence is not a recommendation to offer it.
Scope: People with BPD
- Psychotherapie bij persoonlijkheidsstoornissen
Recommendation for the stated population
MBT is named among recommended specialist BPD treatments.
Scope: BPD; treatment delivered as described and studied
- CG78: recommendations for research
- Focus
- Relational + Skill
- Format
- Individual + Group
- Duration
- Medium-term
Condition-specific assessments
Each conclusion applies to the population and use described. These source-based assessments do not certify the full entry or replace expert clinical review.
Personality Disorders
Population and scope: Adults with borderline personality disorder receiving protocol-based mentalization-based treatment.
Guideline recommendation
The Dutch 2022 guideline recommends MBT among specialist BPD treatments, delivered as studied. Bateman and Fonagy (2009) randomized 134 patients to 18-month outpatient MBT or structured clinical management. Both improved; MBT showed steeper reductions in several problems, including suicide attempts and hospitalization. The primary endpoint combined suicidal behavior, severe self-injury and hospitalization. This record does not generalize to all personality disorders or prove reduced suicide mortality.
Source assessment dated
Suicidality & Self-Harm
Population and scope: Adolescents presenting with self-harm and depression; separately, adults with borderline personality disorder in structured outpatient care.
Randomized studies
Direct randomized studies measure self-harm, including a positive 12-month MBT-A trial. A brief adolescent group feasibility trial found no added benefit, and an adult BPD trial produced mixed comparative results. The tier identifies randomized research, not consistent superiority or proof of reduced suicide mortality; results depend on population and MBT format.
Source assessment dated
How they work
Circle of Security
Core mechanism: Helping caregivers recognize and regulate their own triggered defensive responses (shark music) so they can remain present to their child's actual attachment needs on the Circle of Security: providing safe haven when the child needs comfort and secure base when the child needs to explore
Ontology: Child security develops through repeated experience of a caregiver who is bigger, stronger, wiser, and kind: present enough to provide safe haven and secure base, and capable of reflecting on their own triggered responses without being controlled by them.
Mentalization-Based Tx (MBT)
Core mechanism: Improved mentalizing capacity (understanding mental states in self and others) reduces affective dysregulation and interpersonal chaos
Ontology: Failure of mentalization under attachment stress; inability to represent mental states leads to impulsive action
Related condition topics
These editorial cross-references organize reading. A shared link does not mean both approaches are effective, recommended, or interchangeable for that condition.
1 shared · 3 Circle of Security-only · 2 Mentalization-Based Tx (MBT)-only
Linked to both entries
Linked only in the Circle of Security entry
Linked only in the Mentalization-Based Tx (MBT) entry
What each assumes — and misses
Circle of Security
Philosophical roots: Bowlby (attachment theory, safe haven and secure base); Ainsworth (Strange Situation, attachment patterns); Main (Adult Attachment Interview, reflective function); Winnicott (good enough mothering); Stern (attunement, intersubjectivity)
Blind spots: COS-P group protocol relies on DVD-based delivery which limits individualization; home visiting version requires significant training and supervision; not appropriate for active child abuse situations without additional safety planning; caregiver's own attachment trauma may require individual therapy beyond what COS provides
Therapeutic voice: Your child reached for you just then, and you pulled back. What were you feeling right at that moment? Not what you thought. What you felt.
Mentalization-Based Tx (MBT)
Philosophical roots: Bion (containment, alpha function); Winnicott (holding); Jessica Benjamin (mutual recognition); Theory of Mind research; Hegel (recognition as constitutive)
Blind spots: Deliberately slow, and the pace can frustrate clients who came for symptom relief; offers less structure than skills-based models when a client is in acute crisis
Therapeutic voice: What do you imagine was going on in her mind when she said that?
Choosing between them
Circle of Security (Family Systems) and Mentalization-Based Tx (MBT) (Psychoanalytic) come from different traditions, which means they assume different things about what a person is, what causes suffering, and what the therapeutic relationship is for. The choice between them is often less about "which works better" and more about which set of assumptions fits the client and the therapist.
For deeper coverage: see the full Circle of Security and Mentalization-Based Tx (MBT) pages, or use the interactive comparison tool to add more modalities to this comparison.